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Finding the Fourth Proportional to 85,703.94, 128,506.68 and 45,673.63

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Solution

The fourth proportional to 85,703.94, 128,506.68 and 45,673.63 is: 68,484.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,703.94 : 128,506.68 = 45,673.63 : x
  2. Step 2: Convert to fraction form
    85,703.94/128,506.68 = 45,673.63/x
  3. Step 3: Cross multiply
    85,703.94x = 128,506.68 × 45,673.63
  4. Step 4: Simplify right side
    85,703.94x = 5,869,366,233.58
  5. Step 5: Solve for x
    x = 5,869,366,233.58/85,703.94
  6. Step 6: Final answer
    x = 68,484.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.